diff --git a/realhf/experiments/benchmark/profile_exp.py b/realhf/experiments/benchmark/profile_exp.py
index 537c23c9..aef08a56 100644
--- a/realhf/experiments/benchmark/profile_exp.py
+++ b/realhf/experiments/benchmark/profile_exp.py
@@ -193,22 +193,23 @@ def initial_setup(self) -> List[ExperimentConfig]:
             f"will be saved to: {setup_log_path}"
         )
         with open(setup_log_path, "w") as f:
+            # batch size in the most outer loop to delay the possible OOM error
             for (
+                bs,
                 pcfg,
                 n_mbs,
                 model_cfg,
                 dataset_cfg,
                 handle_name,
                 interface_cfg,
-                bs,
             ) in itertools.product(
+                self.batch_sizes,
                 self.parallel_kwargs,
                 self.n_mbs,
                 self.model_kwargs,
                 self.dataset_kwargs,
                 self.handle_names,
                 self.interface_kwargs,
-                self.batch_sizes,
             ):
                 if handle_name == "generate" and pcfg["use_sequence_parallel"]:
                     continue